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Why trustworthy agent evals need per-task isolation, shown live on Tensorlake microVM sandboxes

0 starsPython

A reproducible harness for catching agent-eval cheating

by sebuzdugan·Jul 13, 2026·2 points·0 comments

AI Analysis

●●●BangerBig BrainWizardry

Catches 53% lie rates in agents using Firecracker microVM isolation.

Strengths
  • Demonstrates massive score inflation (53pt) when using naive non-isolated evals.
  • Uses fast-forking microVMs to guarantee causal separation between test and agent.
  • Provides reproducible scripts proving shared environments corrupt benchmark integrity.
Weaknesses
  • Requires external dependency on Tensorlake cloud for the microVM orchestration layer.
  • Focuses heavily on the harness architecture rather than providing a UI dashboard.
Category
Target Audience

AI researchers, LLM agent developers

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LangSmith · Braintrust · MLflow

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